//  day0606.File1
package day0606;

//1---100之间所有数的平均值
public class File1 {

    public static void main(String[] args) {

        double t=0;
        for(int i=1; i<=100; i++){
            t=i+t;
        }
        System.out.println(t/100.0);

    }

}
